I cannot for the life of me get this stupid time machine to complete a backup. I've never had this problem when using SL so I'm wondering if this is a known Lion issue. My OS disk is 2TB and about 75% filled. My TM backup disk is 2.25 TB. After about a day TM will get to "5 seconds left". At this point the data counter continues to climb. Ex: 1.55TB of 1.55TB...1.58 of 1.58...1.62 of 1.62...etc. At a certain point it will essentially be the size of backup disk itself and TM gives me an error that it ran out of space. I've even tried copying the "backups.backupdb" from my old TM to the new one to avoid the initially large backup. Even it, at a certain point gives me a copying error. I believe it's error code "8003" EDIT: This time I tried excluding some large folders in order to finish an initial backup which worked. Then I added those files back in for backup and its telling me I don't have enough space now.